Install az module if not installed in deploy-stress-tests.ps1 (#20605)

Co-authored-by: Ben Broderick Phillips <[email protected]>

Author: azure-sdk

eng/common/scripts/stress-testing/deploy-stress-tests.ps1

@@ -22,6 +22,7 @@ $FailedCommands = New-Object Collections.Generic.List[hashtable]
 
 . (Join-Path $PSScriptRoot "../Helpers" PSModule-Helpers.ps1)
 Install-ModuleIfNotInstalled "powershell-yaml" "0.4.1" | Import-Module
+Install-ModuleIfNotInstalled "az" "6.4.0" | Import-Module
 
 # Powershell does not (at time of writing) treat exit codes from external binaries
 # as cause for stopping execution, so do this via a wrapper function.